On the day I summoned my life partner, I was told to return it, but there's no precedent for that!?

A world where everyone obtains a partner through summoning. A summoning ceremony for his generation is held in the village, and it's finally his turn. The village chief's daughter tells him to swap partners with her because she's dissatisfied with what she summoned—something he understands but doesn't want to do. Weighing it against the risk of being ostracized by the village, he has no choice but to make the exchange. Because she's the village chief's daughter, he can't go against her authority.